Retirement and Other Employee Benefits - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2025	Dec. 27, 2024	Dec. 29, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	$ 3.4	$ 2.4
Retirement benefits	92.4	83.1
Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	16.2	16.7
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions	0.0
United Kingdom
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contributions	1.9
Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	0.1
Expected future benefit payments, thereafter	0.3
Retirement benefits	1.0
Accrued benefits	0.8
Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	1.3
Pension plans | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	4.6	3.5
Pension plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	(0.5)	(0.3)
Net periodic pension costs	0.1	0.0	$ 0.1
Expected future benefit payments, thereafter	3.7
Pension plans | United Kingdom
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	0.3	1.6
Net periodic pension costs	0.0	(0.2)	(0.5)
Expected future benefit payments, thereafter	13.1
Post-retirement plans | Foreign Plan | Former Executives
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	1.2	1.2
Post-retirement plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan expense	1.5	1.6	1.3
Post-retirement plans | Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	4.6	0.3
Net periodic pension costs	11.4	11.6	11.3
Expected future benefit payments, thereafter	48.9
Post-retirement plans | Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic pension costs	0.6	1.3	1.5
Accrued benefits	1.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	$ 0.3	$ 0.7	$ 0.8
Minimum | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	45.00%
Minimum | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	54.00%